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Windows command reference

Reliability Monitor

Open Reliability Monitor to review a time-oriented history of Windows reliability events and repeated application/system failures.

Risk: LowReviewed: 2026-09-17
perfmon /rel

When to use it

Use when you need to identify when crashes began and correlate them with application, driver or Windows changes.

When not to use it

Do not treat the stability index or a single red failure as proof of the root cause; verify the event/application details in the matching subsystem.

Primary reference

Reviewed source